Reply by schwingding

Couple of thoughts. You could be moving the fence slightly as you feed the workpiece angling it in towards the back of the blade. Check to make sure the fence is immovable.

I set my fence to be .003” further from the back of the blade than the front. That keeps the trailing blade away from the workpiece that has already been cut by the front instead of wandering into it. It also puts any burn marks on the waste piece.

Next, consider a splitter insert behind the blade such as the MJ splitter. I put mine in so it keeps the saved piece tight against the fence after it passes the blade. Makes up for my poor technique and my rips are way better than before.